ImageMagick and OS X Lion trouble

[edit] I was troubleshooting problems with my development environment when I noticed one of my problems was the dependency on ImageMagick, since it's a vital part of my app.

After upgrading to OS X Lion (10.7) i no longer had ImageMagick available, i then tried installing again using MacPorts without success, i then installed from source, and the install wasn't very successfully i had convert and identify but it output error messages that i unfortunately dont have anymore, i by some strange reason decided to remove all of my MacPort libraries and started using Homebrew, i tried installing ImageMagick, it installs OK but when i try to use it throws this error

dyld: Library not loaded: /opt/local/lib/libltdl.7.dylib
  Referenced from: /usr/local/bin/convert
  Reason: Incompatible library version: convert requires version 11.0.0 or later, but libltdl.7.dylib provides version 10.0.0
Trace/BPT trap: 5

I read online but i have no clue on whats going on here, i found that libltdl is called libtool, and that i obviously need to upgrade it to a newer version, but i havent found any indication of how or where to find the source, or if this should be already be handled by homebrew and why it hasn't.

I tried installing ImageMagick again from source using this installer script https://github.com/masterkain/ImageMagick-sl but when i try to use convert it throws a similar error.

$ convert gnome.jpg -resize 50% gnome_.jpg
dyld: Library not loaded: /opt/local/lib/libltdl.7.dylib
  Referenced from: /usr/local/bin/convert
  Reason: Incompatible library version: convert requires version 11.0.0 or later, but libltdl.7.dylib provides version 10.0.0
Trace/BPT trap: 5

$ which convert
/usr/local/bin/convert

What can i do to solve my problem?

On 10.8 I solved this issue with:

brew install libtool --universal
brew link libtool

If you don't know what brew is, visit https://github.com/mxcl/homebrew and its wiki.

brew uninstall imagemagick
brew install imagemagick --build-from-source

worked for me

I too use homebrew for installing packages but imagemagick stopped working after upgrading OSX 10.8 to 10.9 (Mavericks). I had to do the following steps:

brew uninstall imagemagick
brew uninstall libtool
brew install libtool --universal
brew install imagemagick --build-from-source

Why the --build-from-source? Well for me running brew install imagemagick on its own to install the pre-built binary wasn't sufficient; it fixed the original 'dyln' error but was replaced with:

unable to load module `/usr/local/Cellar/imagemagick/6.8.7-7/lib/ImageMagick//modules-Q16/coders/png.la': file not found @ error/module.c/OpenModule/1277

I also upgraded to Lion and lost ImageMagick, although i'm getting different errors.

i found a Lion distribution on imagemagick.org. not a big fan of the DYLD_LIBRARY_PATH environment variable but it works.

ok scratch that. i just downloaded the ImageMagick source and re-compiled:

cd /tmp
curl -OL ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick.tar.gz
tar -xzf ImageMagick.tar.gz
cd ImageMagick-6.7.2-7/
./configure --prefix=/usr/local --disable-static --with-modules --without-perl --without-magick-plus-plus --with-quantum-depth=8 --disable-openmp --with-gs-font-dir=/usr/local/share/ghostscript/fonts
make
sudo make install